Elements Of Remote Sensing MCQ Questions & Answers | Civil Engineering

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26.
Which one of the following statements is correct regarding the GPS satellites?

A. The nominal altitude is about 20,200 km

B. The inclination of axis satellite is 55°

C. The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)

D. All of these

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27.
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is:

A. 130 km

B. 230 km

C. 250 km

D. 500 km

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28.
Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:

A. Electric waves

B. Sound waves

C. Electromagnetic waves

D. Wind waves

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29.
A perfectly black body:

A. Is a diffuse emitter

B. Absorbs all the radiations of every wave lengths

C. Emits power of every wave length

D. All the above

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30.
Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?

A. Solar zenith angle

B. Azimuth angle

C. Look angle

D. All of these

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Elements of Remote Sensing - Section 2